“What can it be? Have bombs been discovered?”

“No. It is a bizarre occurrence and almost unbelievable. The eider downs, all the eider down coverings belonging to the imperial family disappeared yesterday morning.” *

* Historically authentic.

“Surely not!”

“It is just as I say. And it was impossible to learn what had become of them—until yesterday evening, when they were found again in their proper places in the chambers. That is the new mystery!”

“Certainly. But how were they taken out?”

“Shall we ever know? All we found was two feathers, this morning, in the boudoir of the Empress, which leads us to think that the eider downs were taken out that way. I am taking the two feathers to Koupriane.”

“Let me see them,” asked the reporter.

Rouletabille looked them over and handed them back.

“And what do you think the whole affair means?”